I have redistributed the rooms completely to give ample comfortable rooms. I have placed a double bed in one of the children´s rooms but of course a single bed fits better. The kitchen is open to the living room to make a complete living space. Trying to cut off the kitchen makes it small and corridor like and the benefits of closing it off (chiefly to avoid smell exiting) don´t outweigh the practical side. With a good extractor you can easily avoid smell pollution from the kitchen into the rest of the house. I have kept the wcs close to the existing drain points for simplicity. I have shifted the mainbedroom to the main facade.
I really hope our proposal works for your needs, you have ample storage space throughout the house and comfortable bedrooms and bathrooms for you and your children to build happy memories in.
The finishes are warm, contemporary and clean without being too neutral. I have gone for a warm palette which really helps to warm up the space. As for the flooring we could go for a mix of rich gres in the living spaces and a warm parquet in the bedrooms.